Recommended Inspections
Inspection of
Action
Visible parts on pump
Replace or fix worn and damaged parts.
and installation
Make sure that all screws, bolts and nuts are tight.
Check the condition of carrying handle/lifting eyes, chains and wire ropes.
Check that the guide bars are vertical.
Pump casing and impeller
Replace worn parts if they impair function.
Wear on the outlet flange on the pump casing usually causes wear on the
discharge connection.
Wear on the impeller and parts around it necessitates fine adjustment of the
impeller or replacement or worn parts. See “Replacing the impeller”.
Oil quantity
WARNING. If the seal leaks, the oil casing may be under pressure. Hold
a rag over the oil casing screw in order to prevent splatter. See “Safety
Precautions” for additional information.
Check that the oil reaches up to the oil hole. Add oil as needed. See
“Changing the Oil.”
Condition of the oil
A check of the condition of the oil can show whether there has been an
increase leakage. Note: Air/oil mixture can be confused with water/oil
mixture.
Insert a tube (or hose) into the oil hole. Cover the top end of the tube and
take up a little oil from the bottom.
Change the oil if it contains too much water, i.e., is heavily emulsified
(cream-like), or if the oil housing contains separated water. See “Changing
the Oil”. Check again once week after changing the oil.
If the oil contains too much water again, the fault may be:
that an oil screw is not sufficiently tight.
that an O-ring or its sealing surface is damaged.
that the lower mechanical seal is damaged.
Liquid in the stator casing
WARNING. If there has been leakage, the stator casing may be under
pressure. Hold a rag over the inspection screw in to prevent splatter. See
“Safety Precautions” for additional information.
Turn the pump so the inspection hole faces downwards.
Tilt the pump so that any liquid in the stator casing can run out through the
hole.
If there is water in the stator casing, the cause may be:
that an O-ring is damaged.
that the cable entry is leaking.
If there is oil in the stator casing, the cause may be:
that the inner mechanical seal is damaged.
